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Finding the Fourth Proportional to 945.56, 1,304.78 and 531.56

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Solution

The fourth proportional to 945.56, 1,304.78 and 531.56 is: 733.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.56 : 1,304.78 = 531.56 : x
  2. Step 2: Convert to fraction form
    945.56/1,304.78 = 531.56/x
  3. Step 3: Cross multiply
    945.56x = 1,304.78 × 531.56
  4. Step 4: Simplify right side
    945.56x = 693,568.86
  5. Step 5: Solve for x
    x = 693,568.86/945.56
  6. Step 6: Final answer
    x = 733.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.